摘要：
-(void)updateLabel{NSDate*now=[NSDatedate];inthour=23-[[nowdateWithCalendarFormat:niltimeZone:nil]hourOfDay];intmin=59-[[nowdateWithCalendarFormat:niltimeZone:nil]minuteOfHour];intsec=59-[[nowdateWithCalendarFormat:niltimeZone:nil]secondOfMinute];countdownLabel.text=[NSStringstringWithFormat:@" 阅读全文
